While there's nothing like the traditional applesauce and sour cream, here's a bit of variation. It's easy to make and tastes great.
3 teaspoons lemon rind
5 medium pears
8 medium apples
1 teaspoon cinnamon
Core and cut apples and pears. Cover well with water and cook until soft. Stir occasionally to prevent sticking. Put through foley food mill (I see them often in second hand stores) or force through colander to remove skins and seeds. Mix in lemon rind and cinnamon.